This may not really be a C. R. List kind of question .
But , let me say publicly , that if Charlie will contact me privately , off-list , I will share what information I have , try to point him towards other information sources , and generally try to find answers .
As far as the use of 4130 alloy steel , I can say that Schwinn did absolutely use Chromium - Molybdenum alloy steel tubing .
I can't say if it was that particular chromium molybdenum steel alloy .
And most of the , straight gauge , "Chrome Molybdenum" ( as Schwinn called it ) was used in the Superior - Super Sport - Sports Tourer - Superior - Sport Limited family of bicycles .
Cheers ,
Raoul Delmare
Marysville Kansas
> Hi: Was the step-through frame Schwinn Traveler always made in the mixte
> version or was it made also made with the twin downtube construction?
Which
> versions where made of 4130? Thanks. Charlie Endelman